试题详情
- 多项选择题触发器事件和语句是SQL语句、数据库事件、用户事件，导致触发器触发。触发器时机可以是（）。
A、对特别表（视图）的INSERT、UPDATE、DELETE语句
B、对特定模式对象的CREATE、ALTER和DROP语句
C、数据库启动、实例关闭
D、特定的错误消息和任何错误消息
- A,B,C,D
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